Apparatus for winding and forming coils



sfipt 2 8, 1937. J REICHERT I 2,094,024

APPARATUS FOR WINDING AND FORMING COILS Filed April 17, 1934 5Sheets-Sheet l N l INVENTOR & /u/zus Emmi x g: g Zmla W ATTO R N EYSept. 28, 1937. J. REICHERT APPARATUS FOR WINDING AND FORMINGQOILS FiledApril 1'7, 1934 5 Sheets-Sheefc 2 ATTORNEY I ATTORNEY J. REICHERT FiledApril 17, 1934 APPARATUS FOR WINDING AND FORMING COILS Sept. 28, 193 7.

Sept. 28, 1937. J. REICHERT APPARATUS FOR WINDING AND FORMING C OILSFiled April 17, 1934 5 Sheets-Sheet 4 INVENTQ'R fat/aw Kerri ATTO R N EYREBCHERT APPARATUS FOR WINDING AND FORMING COILS Filed April 17, 1934 5Sheets-:Sheet 5 ha a M ATTORNEY Patented Sept. 28, 1937 UNITED STATESPATENT OFFICE Julius Reichert, Astoria, N. Y.

Application April 17,

30 Claims.

This invention relates to an apparatus for winding and forming coils,and more particularly to a machine for winding and shaping armature andstator coils used in electric dynamos and motors.

Armature and stator coils used vin electric motors and dynamos vary inshape and size according to the type and size of motor or dynamo towhich they are to be applied. Coil winding and forming machinesheretofore provided have possessed a number of draw-backs which havemade their use and operation unsatisfactory. By way of example, in themachines heretofore provided, only one coil can be shaped and formed ata time. Since most motors and dynamos require a considerable number ofcoils, the operation of winding a suflicient number of coils for themotor armature has consequently consumed considerable time and labor.Furthermore, machines heretofore provided have required a number ofmanual manipulations in forming the coils which haverequiredconsiderable skill to execute, with the result that the coils producedare often not uniform in size and shape, and the coils are furtherdefective in that the strands of wire are not in proper position norassembled with suflicient compactness and uniformity to produce ahigh-grade product. In addition to the above defects, coil-formingmachines heretofore provided have been complicated in construction,cumbersome to operate and expensive and wasteful in material.

An object of this machine is to provide a coilwinding and formingmachine upon which a plurality of coils may be simultaneously made inone operation.

Another object of this invention is to provide a coil-winding andforming machine which is substantially automatic in operation and whichwill produce coils which are compact, accurate and uniform in shape,form and size.

Another object of this invention is to provide a coil-winding andforming machine which can be easily and quickly adjusted to efiicientlyand effectively wind and form coils of any desired shape, form or size.

Still another object of this invention is to pro-- 1934, Serial No.721,049

ciated therewith means for automatically throwing the machine out ofoperation when the desired number of strands of wire have been woundinto the respective coils. I Another object of this invention is toprovide a automatic wire-winding and forming machine particularlyadapted for the manufacture of armature and stator coils for electricdynamos and motors, which is strong and sturdy in construction andsubstantially fool-proof in operation, which can be operated byunskilled labor, which requires a small amount of floor space, whichcomprises relatively few moving parts, and which'is relativelyinexpensive to manufacture and assemble. e

Other objects of this invention will become apparent as the disclosureproceeds.

According to this invention, a frame structure is provided, rotativelymounted on a suitable shaft which maybe driven by hand or by motor. Aplurality of blocks, the number depending upon the shape of the coil tobe formed, are slidably mounted within the frame. Where an hexagonallyshaped coil is to be formed, such as is generally used for armaturecoils, four blocks, mounted as above described, are provided. The coilsare wound around a plurality of arms projecting laterally from theframe, each arm being adjustably connected to the slidable blocksmounted in the frame. Where hexagonal coils are to be formed, two outerarms and four intermediate arms are provided. The ends of the coils arewound around the two outer arms and the sides of the coils are woundaround the intermediate arms. The outer arms are provided with aplurality of interchangeable and replaceable partition elements uponwhich the" respective coils are wound. The partition elements are soshaped as to give the end portions of the coil the desired shape andcontour. The intermediate arms are also provided with interchangeableand. replacetive coils are secured in position by means of an vadjustable clamp applied to the ends of the respective strands. Theframe is then rotated, during which operation the respective strands arewound around the outer arms and the intermediate arms. During thisoperation the partition elements mounted on all the arms are inalignment, and a closed coil is thus formed. when the desired number ofturns of wire have been wound around the arms, the rotation of the frameis stopped.

The coils are then expanded into the desired shape and form by drawingone'set of intermediate arms on one side of the coil toward the frame,and simultaneously pushing the other set of intermediate arms on theother side of the coil away from the frame until the coils assume thedesired hexagonal shape. The outer arms, during this operation, remainas before,

and the end portions of the coils are held in their original position.The desired offset in the end portions of the coils is produced when theside portions of the coils are expanded.

The expanding operation is performed by the operator by a simple turn ofa crank geared to a pair of shafts, which are rotated by turning thecrank. One shaft is operatively connected to one set of intermediatearms engaging one side of the coils. The other shaft is operativelyconnected to the other set of intermediate arms en- Baging the otherside of the coils. The entire coil-expanding operation is performed by asimple clockwise turn of the crank. The arms are returned to theircoil-winding position by a corresponding counter-turn clockwise of thecrank.

To efi'ect uniform expansion of the coils, the outer arms areautomatically drawn inwardly toward the intermediate arms, as thecoil-expanding operation proceeds, by means of a link connecting theouter arm to one of the intermediate arms. Each outer arm is thusautomatically drawn inwardly by the link connected thereto, while oneset of intermediate arms is pushed away from and the other set of armsare drawn toward the frame.

Mechanism is provided for automatically weaving each strand of wire soas to compactly lay the strands in proper position to produce a coil ofthe desired thickness and uniformity of cross section. The weavingmechanism is operatively connected and synchronized with the drive shaftupon which the winding frame is mounted. Smooth and uniform laying ofthe coil, in compact arrangement, is thus assured.

Mechanism is also provided which records the number of turns of wirewhich are wound on to the coils. This mechanism may be adjusted so thatthe desired number of turns are wound on to each coil, and when thedesired number-of turns have been completed, to automatically throw oilthe power and halt the winding operation of the machine. The mechanismmay be set to halt the machine at the end-of any desired. windingoperation. The machine is substantially automatic in operation and doesnot require the careful attention which machines heretofore providedrequire.

After the coils have been completely shaped and formed they may beeasily removed by inwardly drawing the outer paired arms so as to permitthe coils to hang loosely on the end of these arms. The mechanismprovided for this purpose comprises a threaded shaft which may berotated by means of a suitable crank operatively connected thereto bysuitable gearing. Each end of the threaded shaft extends through athreaded lug projecting from the intermediate slide blocks. Rotation ofthe crank moves the intermediate slide blocks towards or away from theaxis of rotation of the machine.

The partition elements carried on the ends of the outer arms may beeasily removed by the removal of a retaining nut threaded to the ends ofthe respective outer arms. When the coil has been removed the partitionelements are replaced in position on the outer arms and the machine isready for another winding operation.

The partition elements carried by both the outer and the intermediatearms are contoured to give the coils wound thereon the desired shape andsize. The partition elements are interchangeable and replaceable, andthus the machine is adapted to wind a vast variety of ,coils ofdifferent shape, size and form by the application of proper partitionelements.

The machine may be mounted on any suitable table or standard convenientor desirable. The machine occupies a minimum space, is substantiallyautomatic in operation, is adapted to wind coils of different shape,size and form simultaneously, and any number of coils may be woundsimultaneously substantially without additional labor.

In order that a clear understanding of this invention may be had,attention is directed to the accompanying drawings, forming a part ofthis specification, in which:

Figure 1 is a plan view of my coil winding and forming machine in whichcertain parts, such as I the driving motor and associated windingindicator and switch mechanism, are omitted from this view;

Figure 2 is an'end view of the machine mounted upon a supporting table;

Figure 3 is a fragmentary plan view of the machine showing particularlythe rotatable frame and the adjustable winding arms associatedtherewith;

Figure 4 is a vertical cross sectional view taken longitudinally of therotatable frame along the line 4-4 of Figure 3;

Figure 5 is a transverse cross sectional view showing the frame and theassociated intermediate winding arms, this view being taken on line 5-5of Figure 3;

Figure 6 is a transverse cross sectional view through the rotatableframe, showing particularly the means for effecting adjustment of thewinding arms, this view being taken on line 6'--6 of Figure 3;

Figure '7 is a cross sectional view through a portion of the rotatableframe and associated slide blocks and winding arms, this view beingtaken from line 1-1 on Figure 4;

Figure 8 is an enlarged perspective view of the winding arms of themachine, this view showing particularly the coil retaining partitionelements associated therewith, certain of the partition elements beingshown exploded away from the winding arms to more clearly illustrate theconstruction;

Figure 9 is an enlarged elevational view of one Of the intermediatewinding arms showing the partition elements associated therewith ofvsomewhatmodlfied construction and provided with an adjustable lockingpin for retaining the wound coils in fixed position on the arms duringthe expanding and shaping operation thereof;

Figure 10 is a transverse cross sectional view through the intermediatewinding arms and associated modified partition elements, this view beingtaken on line Ill-l of Figure 9;

Figure 11 is a transverse cross sectional view through the intermediatewinding arms and associated modified partition elements, this view beingtaken on line ll-ll of Figure 9;

Figure 12 is an enlarged plan view of the winding arms and associatedpartition elements, the intermediate winding arms being shown incoilexpanding position to illustrate how the coil-expending operation isperformed; I

Figure 13 is a fragmentary perspective view of an armature coil as itappears when fully shaped and formed by my machine;

Figure 14 is an enlarged fragmentary perspective viewof the wire guidingand tightening device used to guide the strands of-wire onto thepartition elements, the device also being adjustable so as to exert thedesired drag upon the wire strands as they are wound about the windingarms;

Figure 15 is a perspective view of a locking bolt to which the ends ofthe wire strands are locked, the key then being attached to one of thewinding arms of the machine so as to draw the wire strands around theframes when rotated;

Figure 16 is a side view of the locking bolt, certain parts being brokenaway to illustrate the construction;

I Figure 1'7 is a cross sectional view through the locking bolt, thisview being taken on the line 11-41 of Figure 16;

Figure 18 is an enlarged elevational view of the winding indicator andassociated switch and stop mechanism operatively connected to thedriving shaft of the machine;

Figure 19 is a vertical cross sectional view through the windingindicator and associated switch and stop mechanism, this view beingtaken on line l9|9 of Figure 18; and

Figure 20 is an end view of the winding indicator and associated stopmechanism as they appear when looking along line 20-20 of Figure 19.

Similar reference characters refer to similar parts throughout theseveral views of the drawings and specification.

Referring more particularly to Figures 1 and 2, the operating parts ofthe coil winding and forming mechanism are operatively connected to adrive shaft l rotatably mounted in a bearing 2 supported by a sturdyV-shaped frame 3. The V- shaped frame may be provided with feet 4,bolted or otherwise secured to a suitable operating table. The table maybe of any convenient size and form, comprising, for example, thehorizontal frame members 5, and the transverse frame members 6 suitablysecured and supported by the legs 1. One end of the drive shaft isconnected to a hand crank, driving motor or other suitable driv ingmechanism. The other end of the shaft is fixed to a shaft extensionmember 8, upon which is mounted a rectangular frame. The shaft extension8 may be an I-beam, or other shaped member of suflicient strength tocarry the rectangular frame and associated parts.

Referring more particularly to Figures 3 and 4, the rectangular framecomprises four bars 9, I0, H, and 12, extending at right angles to therotatable member 8 and fixedly secured thereto. Cross pieces, l3 and I4,connect the respective ends of the bars 9, l0, H, and I2 together toform a rigid and sturdy rectangular frame.

When hexagonal shaped coils, such as are generally used for armature andstators of electric dynamos and motors, are to be formed, four slideblocks are provided. End slide blocks 15 are positioned at opposite endsof the frame, and are provided with legs l6 which slide within thegrooves ll formed in each of the frame forming bars 9, HI, II, and I2.The blocks 15 are free to slide towards and away from each otherlengthwise of the frame, the legs I6 being of sumcient length so thatthe blocks will slide smoothly and evenly.

An outer arm 20 is mounted within each of the slide blocks and projectsat right angles to the rotatable frame and parallel to the rotating axisthereof. The outer arms 20 may be provided with longitudinally extendinggrooves 2| on each side thereof which'provide a track-way for the lugsl9 projecting inwardly from the slide blocks l5, as shown moreparticularly in Figures 4 and '7. The outer arms 20 may thus be adjustedlaterally with respect to the blocks I 5. The outer arms 20 receive theend portions of the coil during the winding operation, as will bebrought out more fully hereafter.

A pair of intermediate arms, 22a and 22b, project laterally and areslidably mounted in one of thetwo intermediate blocks 24 whileintermediate arms, 23a and 23b, are slidably mounted in the otherintermediate block 24. The paired intermediate arms, 22a and 22b, andthe paired intermediate arms, 23a and 23b, project laterally at rightangles from the frame, extend parallel to the axis of rotation thereof,and slide longitudinally with respect to one another.

The intermediate slide blocks 24 are each pro-'-' vided with legs 25which slide along bars 9, III, II, and I2 steadying the sliding movementof the blocks 24. The legs 25 may be so spaced as to slide or telescopeover the adjacent end blocks l5, thereby assuring smooth slidingmovement of the end blocks l5, and the intermediate blocks 24. Thesteadying legs I6 and 25 respectively may be curtailed in length, orentirely eliminated, if desired.

The paired intermediate arms, 22a and 22b, and the paired intermediatearms, 23a and 23b, are each provided with a longitudinally extendingslot 26 at the frame end thereof. The intermediate blocks 24 are eachprovided with a web portion 21 which extends through the slots 26 of theassociated paired intermediate arms. The web 21 serves to guide thesliding movement of the paired intermediate arms with respect to theassociated intermediate slide block 24.

The intermediate arms, 22a and 23a, are arranged to support one side ofthe hexagonal coil, and the intermediate arms 22b and 23b are arrangedto support the other side of the hexagonal coil. When the desired numberof turns of wire have been wound upon the end arms 20 and theintermediate arms 22a and 23a, 22b and 23b, the coil is expanded so asto shape the same into hexagonal form. The shaping operation isaccompleted and the rotating movement of the frame has stopped.

Mechanism is provided for performing the expanding operationsubstantally automatically by simply turning a crank 23. Referring moreparticularly to Figures 1, 3, and 6, the crank 23 is connected to ashaft 29 having a worm gear 30 at each'end thereof. Each worm gear 33meshes with and operatively engages a gear 3| fixed to a shaft 32journalled in bearings 33 projecting from the sides of the intermediateslide blocks 24. The shafts 32 are also journalled in a suitable bracketIII fixed to the rotating axle 3. The shafts 32 carry a gear 34 at eachend thereof which meshes with a rack member 35 carried by and fixed tothe intermediate winding arms. It will be noted that one of the shafts32 is positioned on one side of the frame, and when rotated operates theintermediate winding arms 22a and 23a, while the other shaft 32 ispositioned on the other side of the frame and operates the intermediatewinding arms 22b and 23b. By referring to Figure 1, it is seen that bymeans of a single clockwise turn of the crank 23, the arms 22a and 2311are drawn towards the frame while the intermediate arms 22b and 23b areforced away from the frame into the position shown in Figure 12 thusoperating to expand the coils. During this expansion movement, the endarms 20 move inwardly toward one another.

Means are provided on the outer arms 20, and on the intermediate arms22a, 22b, 23a, and 23b for retaining the coils in position while beingwound. Referring more particularly to Figure 8, the end arms 20 are eachprovided with a reduced end portion 50. Partition elements each providedwith a notch 52 therein, snugly fit over the reduced end portion 50.Spacer elements 53 are also provided with a notch 54, and they also fitover the reduced portion 50 of the arms 20. The spacer elements 53 arepositioned between the partition elements 5| and are provided with anouter contour 55, which conforms tothe desired inside contour of the endportion 203 of the coil. A coil is received between each pair ofpartition elements 5|, and the wires forming the coil are all woundaround a spacer element 53. Since the spacer elements 53 are removableand replaceable, any desired shape may be given in the end portions 200of the coil by providing spacer elements 53 of the proper contour.

The cross sectional thickness of the coil may also be varied as desiredby providing spacer elements 53 of corresponding width. It is understoodthat the spacer elements 53 may be permanently secured to the partitionelement 5| as an integral part thereof, if desired. The partitionelements 5|, and the spacer elements 53, are retained in position on andremoved from the reduced end portion 55 of the end arms by adjusting awing nut 55 which threads on to a threaded portion 51 extending from thereduced end portion 53.

The intermediate winding arms 22a, 22b, 23a, and 231) are also providedwith portions 58, having mitered sides 59 to retain the spaced partitionelements 60 thereon. Each of the partition elements 50 are provided witha dove-tailed slot,6| through which the mitered end portions 53 of theintermediate arms project. The partition elements 6|! are placed uponthe mitered end portions 53 by sliding the same endwise thereover.

The spacer elements 62, likewise provided with a dove-tail slot 63,slide over the mitered end portions 53. The partition elements 53, andthe spacer elements 62, are thus locked in position on the end portions53. The coils are each wound between a pair of the partition elements33, having a spacer element 62 positioned between. The cross sectionalwidth of the coils will depend upon the width of the spacer elements 32mounted upon the intermediate arms, and upon the width of the spacerelements 55 mounted upon the end arms 20. The removable and replaceablespacer elements 55 and 32 may be supplied in sets to correspond to thedesired shape and cross section of the coil to be formed.

The end partition element 34 may be modified by providing a projectinglug 35 which extends downwardly into the dove-tailed slot 3|. The lug 65may be inserted into an aperture 53, cut in the end portion 53 of theintermediate arms. The partition elements 30 and 54, the spacer elements32, may all be locked in position by means of a set screw 61 whichscrews into the end of the end portion 53 and engages the lug 55 ofpartition element 54 extending into the aperture. The means for lockingthe various partition elements and spacer elements in place are heredescribed for purposes of illustration only, as it is understood thatthey may be modified as conditions require without departing from thespirit of this invention.

It is now seen that any number of partition elements and spacer elementsmay be mounted on the respective intermediate and and arms of themachine so that a plurality of coils may be wound and shapedsimultaneously. The number of coils which may be simultaneously formedis limited only by the power supplied to drive the various elements. Theshape and form of the coils may also be varied as desired by providingspacer elements 53 and 320i the proper size and shape. The machine canthus be made to shape and form almost every conceivable type of coil.

The expansion of the coil from its wound position requires that theouter arms 20 be moved closer together. Accordingly, means are providedfor moving the outer arms 20 inwardly the required amount. By referringto Figures 1 and 4, it will be noted that a link 43 is connected to eachof the outer slide blocks l5, and the adjacent intermediate slidablearms 22b and 2317. More particularly, one end of the link 43 isconnected to a lug 4| projecting laterally from the outer block l5, andthe other end of the link is provided with a hook 44 which hooks into anopening 43 provided in a connecting plate 42 secured to the rack 35fixed to the intermediate winding arm. When the intermediate arms aredrawn towards the frame work, the links 40 will draw the sliding outerblocks |5 carrying the outer arms 20 inwardly the proper correspondingamount. It is thus seen that the expanding operation of the coil issubstantially automatic, is performed by a simple turning movement ofthe crank 23, and that any number of coils can be expanded in a single,simple operation.

The machine may be adjusted so that coils of any size may be made.Referring to Figures 3 and 4, a shaft 48, which is threaded at each end,it rotatably mounted within a suitable bearing carried by a: bracket H,secured to the rotating axle 3. The shaft 48 is rotated by a crank 45connected to a worm gear 45, suitably journalled in the bracket II. Theworm gear 45 meshes with a gear 41, suitably fixed or splined to theshaft 48. The threaded ends of the shaft 48 each engage the threadedcollar 49 mountedin the lug 89 extending from the intermediate slideblocks 24. By a simple turning movement of the crank 45 intermediateslide blocks 24may be moved towards or away from each other the desiredamount. The space distance between the intermediate arms determines thelength of the side wall portions 28I of the coil. If the length of theside wall portions 28I of the coil is appreciably modified, thelength ofthe side wall portions 282 may be correspondingly modified bymanipulating the threaded adjusting nuts 88 and 8|, so that theouterblocks I5 are adjusted inwardly or out-- wardly, as the case may be, therequired distance to produce a uniformly shaped coil.

In order that the intermediate arms 22a. and 23a, and the intermediatearms 22b and 23b be adjusted closer together or farther apart, the

.shaft 32 is provided with a spline or a groove 38 which engages with acorresponding spline or groove in the gears 34. The gears 34 arethusfixed to rotate with the shaft 82, but may be adjusted in anyposition lengthwise thereof. It is thus seen that the operating elementsof the machine may be quickly and easily adjusted so as to permit thewinding and expansion of any size of coil, and to furthermore permit theformation of a coil of almost every conceivable shape.

The racks 35 extend over the respective frame bars 9, I8, II and I2 andare secured to the respective intermediate arms 22a and 22b, 23a and 23bby means of screw bolts 31 extending through spacer blocks 36 and intothe intermediate arms. This construction is fully illustrated in Figures3, 4, and 5. The rack 35, as thus arranged, makes steady the slidingmovement of the intermediate arms, and generally strengthens theconstruction.

Means are provided for suitably attaching the ends of the wire to thewinding arms so that the winding arms when rotating will wind the wireinto coils. The free ends of the wires may be attached to any one of thewinding arms by means of a key member which is illustrated moreparticularly in Figures 15, 16, and 1'7. The key member comprisesgenerally a round pin 83 having a semi-cylindrical shell member 84hinged thereto by means of a hinge pin 85. A locking element 86, whichmay comprise a suitable ring telescopes over the pin 83 and shell member84. The free ends of the wires W are placed between the pin 83 and theshell member 84, the shell member 84 then is tightened and closed aroundthe body of the pin 83 and the wires locked to the pin by means of thering 88. The pin member with the wires connected thereto is inserted orseated against the partition elements 5| of the outer winding arms orthe partition elements 88 of the intermediate winding arms, as the casemay be, and when the frame work and winding arms are rotated the wireis. looped or coiled around the arms. It is understood that the coilsmay be made from one continuous wire strand, or from two, three, or morecontinuous wire strands. The machine is adapted to form coils of anynumber of wire strands.

It is important that the wires be held taut while being wound intocoils, and that a predemeans of-a suitable set screw. 18. The 'wiresextend between the cross piece 11 and the cross arm 16, and are drawnthrough. The pull required to draw the wire through may be varied asdesired by adjusting the set screw 18. Friction padding 19 may beapplied to the cross arm 16 and the cross piece 11, and the frictionpadding 19 may also be suitably grooved so as to retain the wires intheir proper coil-forming position. The rack member 15 is free to swingor pivot so as not to hamper or interfere with the winding operation ofthe winding arms. The rack member 15 is provided with teeth 81 adaptedto engage with a gear 88 fixed to a reciprocating shaft 89. The shaft 89is suitably journalled in cross pieces 98, extending between the framepieces 5 of the supporting table. A U-shaped member 9|, fixed to theshaft 89, encircles the rack member 15 and retains the same inengagement with the gear 88. The member 15 carries a pin 94 adapted toadjustably-engage with the teeth 95 on the sprocket wheel 93 permittingthemember 15 to be held in any desired raised position. Any otherconvenient form of adjustment may be used within the scope of thisinvention.

The wires should be wound into the coils in smooth and even layers. Thisis accomplished by providing mechanism for weaving the wire or wiresduring the winding operation back and forth between the partitionelements. The meohanism for weaving the wires into the coil 1? shownmore particularly in Figurel, comprising a rod I58, connected to the endof the shaft 89 by means of a suitable hinge pin I5I The other end ofthe rod I58 is journalled to a pinion I52 extending off-center from awheel I53. The wheel I53 is fixed to a shaft I54, which rotates in ajournal I55, carried by a bracket I58, secured to the frame structure 3of the machine. The shaft I54 is connected to the drive shaft I of themachine through reduction gearing comprising intermeshing beveled gearsI51 and I58 and gears I59 and I68. As the drive shaft I, and theassociated frame work and winding arms are rotated, the train of gearsoscillates the connecting rod I58 and the shaft 89 which carries themember 15 and the cross arm 18. The cross arm 16 through which the wiresare drawn is thus oscillated in timed relationship to the rotatingmovement of the winding arms, so that the wires forming the coils arelaid smoothly side by side and in close compact layers. Any crosssectional width of coil may thus be quickly and efliciently formed fromone 'or more wire strands.

In forming certain types of coils it may be desirable to firmly lock thecoils within the partition elements duringthe expanding operation. ThisI propose to accomplish by the use of looking devices which areconnected to the partition elements as shown more particularly inFigures 9, 10,. and 11. r

A lacking key 118 comprising a fiat bar is positioned. in a suitablegroove I 88 provided in the top of each partition element 84. Lockingkeys are provided for the intermediate winding arms 220., 22b, 23a. and23b, but are generally not needed in connection with the outer windingarms 28. The locking keys I18 are each provided with a head portion I1Iwhich is connected by means of a pin I12 to a bracket I18ya'ssociatedwith the first partition element Q18 preferably permanently fixed to thewinding arm. The pin I12, shown more particularly in Figure'lll, rotatesin journals I15 provided in the bracket I13 projecting from thepartition element I14.

Means are provided for adjusting of the locking key to accommodate coilsof different size. This adjustment is effected by providing slots I16cut through the spaced arms I11 extending from the head portion I1I ofthe locking key. The pivot pin I12 extends through the slots I15, asclearly shown in Figures 9 and 10. A connecting bar I18 is fixed to theends of the spaced arms I11 and supports an adjusting screw I19 providedwith a threaded end portion I8I, which extends through a threadedopening provided in the pivot pin I12. The adjusting screw I19 carries acollar portion I82 rotatably retained between the connecting bar I18 andthe top plate I83. By rotating the adjusting screw I19, connected asabove described to the arm portions I11, the head portion "I of thelocking key may be moved towards or away from the partition elements 64.The locking key I10 is free to pivot around the pivot pin I12 and swingout of and into the grooves I provided in the partition elements 84, andat the same time it may be adjusted towards or away from the partitionelements. Coils of different size may be conveniently wound around thewinding arms and locked in position by means of the locking keys I10.

Means are provided for securely holding the free end I85 of the lockingkey in locked position. As shown more particularly in Figures 9 and 11,a U-shaped bracket I88 is pivotally connected by means of a pin I81 tothe end partition element 84. A shoe I88 slides on the arm portions ofthe U-shaped bracket. The shoe I88 is provided with a projection I89which is adapted to engage the outer end I85 of the locking key I10 whenin coil retaining position. An adjusting screw I90 extends through theweb portion I9I of the bracket and is rotatably retained in position bymeans of spaced collar portions I92 and I98 between which the webportion I9I of the bracket is positioned. The adjusting screw I90 isprovided with a threaded portion I94 which extends through a threadedopening in the shoe I88. By manipulating the adjusting screw I90 thefree end I85 of the locking key may be moved towards or away from thepartition elements. The locking keys I10 are placed in locked positionafter the coils have been completely wound upon the winding arms, andprior to the expansion operation. when the coils have been completelywound, the locking keys I10 are swung into place so as to extend acrossthe several partition elements, and adjusting screw I19 is manipulated.to permit the locking key I10 to accommodate itself to the crosssectional size of the coils. The pivoted bracket I81 is then swung intoposition so that the shoe I88 extends over the free end I85 of thelocking key. Adjusting screw I90 is then manipulated so as to move theshoe I88 firmly against the free end I85 of the locking key. The bracketmember I88 preferably pivots about the pivot pin I81 with sufficientfriction so that the bracket will remain in an erect position whenadjustment has been made. It is thus seen that coils of any crosssectional shape or size may be firmly locked against movement betweenthe partition elements so that the coils will retain their proper crosssectional shape during the expanding operation. The locking keys andassociated adjusting device above described may be provided for in oneor all of the winding arms as found convenient or desirable.

Mechanism is provided for recording the number of turns of wire appliedto the coils. The

recording mechanism may be set and adjusted to throw a switch and haltthe winding movement of the machine when the desired number of turnshave been applied to the coils. This mechanism is especiallyadvantageous when coils having a large number of wire turns are to beformed since it relieves the'operator from the tedious task of countingthe number of turns applied during the winding operation. The operatorcan then give his attention to other details of the winding operationwith the assurance that the coils will have the proper number of turns.

As shown in Figures 18, 19, and 20, a worm gear I00, carried by thedrive shaft I, meshes with a gear I M connected to a shaft I02. Theshaft I02 is rotatably supported in a bearing carried by a bracket I04projecting from the V-frame 8 of the machine. The shaft I02 isdetachably connected by means of a suitable clutch device to thewindings recording device I85.

The drive shaft I is provided with a reducing end portion I 08 whichrotates in a bearing I01 carried by a supporting arm I05 extending fromthe end of the bracket I04. The driving motor or other suitable drivingmechanism is operatively connected to a drive wheel I08 which idles onthe shaft I. The drive wheel I08 may be provided with a suitable grooveI09 in the periphery thereof which receives the drive belt connected tothe motor.

A clutch mechanism associated with the drive shaft I is provided, whichunder normal operating conditions is operatively connected to the drivewheel I08. An automatic clutch-throwinl mechanism connected to thewindings recording device I35 operates to disconnect the shaft I fromthe drive wheel I08. The clutch mechanism above referred to comprisesgenerally a sleeve II2 fixed to the shaft I. A brake-drum III extendsfrom the sleeve I I2 and is provided with a flanged portion II8 which isadapted to frictionally engage a complementary drum portion IIIextending laterally from the drive wheel Ill. The periphery of theflanged portion I I8 of drum III is inclined, as shown more particularlyin Figure 18, so as to frictionally bind and engage the complementaryinclined surface of the drum portion I I0 associated with the drivewheel. The drum member III is normally held in frictional engagementwith the complementary drum portion I I0 by means of a coil spring I I8which seats against a ring II4 surrounding the sleeve II2. One end ofthe ring II4 seats against the collar portion I I5 provided on the shaftI, and the other end of the ring I I4 is provided with an abutment whichpresses against one end of the coil spring H6. The other end of the coilsprin seats against the drum member II I and resiliently retains thedrum member in frictional binding engagement with the drum portion IIOof the drive wheel I08. v

A clutch disconnecting mechanism is provided for retracting the drummember III out of engagement with the drum portion IIO of the drivewheel. A second ring member II1 slidably telescopes over the ring memberH4, and is operatively connected to the drum member III by means ofheaded studs II8 projecting from the drum member III. The headed studsII8 extend through an outwardly flared flange I49 formed on the secondring member H1. The second ring member H1 is also provided with acircumferential groove I22 into which the pins I2 I projecting inwardlyfrom the Y-shaped arms I23, extend. The Y-shaped arms I23 extend fromthe end of a lever II9 pivoted on a pin I 20- extending from the bracketI04. By manipulating the lever II9, the ring member I" may be disengagedfrom driving contact with the drum portion I I and the drive wheel idleson the shaft I.

A coil spring I24 connected to the lever I I9 and the bracket H04normally operates to retain the drum member I I i out of driving contactwith the drive wheel. The lever H9 is connected to one end of a pullmember I25 by means of a pin I26. The pull member I25 extends through asuitable opening provided in the supporting frame 3 of the machine andis provided with a manipulating handle I2'I which may be grasped by theoperator so as to manipulate the lever H9 and throw the drum member IIIinto operative frictional engagement with the drive wheel I08. Byexerting a pull on the handle I2I against the action of the coil springI24-the machine is operatively connected to the drive wheel I08 and themachine thrown into winding operation.

A locking bolt I3! is provided for releasably retaining the drum memberIII operatively connected to the drive wheel I08. The end portion of thelocking bolt I3I engages within a notch I32 in the pull arm I25. Thelocking bolt I3I forms a part of the core of a solenoid I30 which isoperatively connected to a suitable power source through a switchmechanism connected to the recording device I35, which will be presentlydescribed. The lock bolt I3I is provided with a,

collar portion I33 against which a coil spring I34 seats so as tonormally retain the lock bolt in seating-engagement with the notch I32provided in the pull arm I35. When the locking bolt I3I is positioned inthe notch I32, the drum member II I is operatively connected to thedrive wheel I 08. When the solenoid I30 is energized the looking boltI3I is withdrawn and the coil spring 1124 is free to swing the lever II9so as to throw the drum member I II out of operative contact with thedrive wheel I08. Rotation of the drive shaft I will then stop. Thehandle I2'I is only manipulated to connect the drive wheel I08 to thedrive shaft I so as to start the winding operation and the windingoperation is halted when the solenoid I30 is energized so as to retractthe locking bolt I3I permitting the coil spring I24 to throw the drummember III out of engagement with the drive wheel I08.

The electrical circuit which energizes the coil spring I30 includes amake and break switch of which the recording device I35 forms anintegral part. The recording device I35 comprises a disc having aplurality of spaced holes I38 arranged around the periphery thereof. Therecording disc normally idles on the shaft I36, but is operativelyconnected to shaft I02 by means of a clutch mechanism which will now bedescribed.

The clutch mechanism associated with the recording device may be similarto the clutch associated with the drive shaft I above described,comprising essentially a sleeve 2I0 carrying a friction drum 2 adaptedto operatively engage the drum portion 2 I2 extending from the recordingdisc. The sleeve member 2I0 is fixed to the shaft I02 and rotatestherewith. A ring member 2I3 telescopes over the sleeve 2I0 and abutsagainst the gear IOI which drives the shaft I02. The ring member 2I3 isprovided with an abutment portion which retains the coil spring 2I4pressed against the drum member 2| I. A second ring member 2I5telescopes over the ring member 2I3 and retains the coil 2I4 inposition.

Headed studs 2| 6 project from the friction drum 2 through openings inthe flange 2I.'I which flares outwardly from the second ring member 2 I5. A circumferential groove 2 I8 extends around the second' ring member2I5 and is engaged by pins 2I9 extending inwardly from the Y-shaped arms220 of the lever 22I. The lever 22I is pivotally mounted from a stud 222projecting from the supporting frame 3 of the machine. During thewinding operation the drum member 2 of the clutch operatively engagesthe drum portion 2| 2 of the recording device I35, and the recordingdevice I35 thus rotates as the winding operation is in progress. Therotation of the recording device I35 is, however, immediately haltedwhen the winding operation stops, preventing possible damage to therecording mechanism and associated switch device.

It will be noted that the pull arm I25 carries a cam shaped lug 223 onthe lower edge thereof. The cam shaped lug 223 is adapted to ride overthe curved end portion 224 01 the lever 22I so as to rock the leveragainst the action of the,

coil spring 2 I4, and retract the friction drum 2 from the drum portion2| 2 and thus disengage the recording device I35 from the shaft I02.Thus when the solenoid I30 is energized so as to withdraw the lockingbolt I3I, the coil spring I24 operates to disconnect the drive wheel I08from the shaft I so as to stop the winding operation of the machine.Simultaneously with disconnecting movement of the lever II9, the camshaped lug 223 of the pull arm I25 is drawn over the curved end portion224 of the lever 22I so as to rock the lever 22I and disengage therecording device I35 from the shaft I02. The clutch mechanism associatedwith the drive shaft I and the clutch mechanism associated with therecording device I35 are so synchronized that rotation of the recordingdevice I35 is halted simultaneously with, or a split second ahead of,the complete halting of the winding operation of the machine. Thissynchronized effect is accomplished by so arranging the cam lug 223 thatit will rock the lever 22I and halt the rotation of the recording devicea split second before the winding momentum of the drive shaft has beenovercome by the load inertia.

The gear ratio between the gear MI and the worm gear I00 is such thatwhen the drive shaft I makes a complete revolution, the recording deviceI35 is rotated a predetermined number of degrees. The spaced distancebetween the holes I38 of the recording device I35 represents the angulardistance which the recording device I35 travels during a completerevolution of the drive shaft I. Consequently each spaced hole I 38represents a complete turn of the wire being wound into the coils. Aswitch arm I4I rotates on the stationary extension shaft I36 fixed to abracket I45 extending from the supporting frame-of the machine. Theinner end of the shaft extension I36 makes a ball and socket connectionwith the end of the shaft I02. The switch arm I4I carries a pin I39, theinner end of which is adapted to be selectively inserted in the holesI38 of the recording disc. The pin I39 extends through an openingin ahousingportion I 44 formed in the arm MI and carries a button I40 bymeans of which the pin I39 may be manipulated. The housing portion I44contains a coil spring I46 which engages a collar portion I4'I providedon the pin I39 so as to resiliently retain the end of the pin I39 seatedwithin the selected hole I30 in the recording disc. By manipulating thehead portion I40 of the pin I the switch arm I may be moved to anydesired position and locked in the selected position by releasing thehead I40 and permitting the pin I39 associated therewith to slip intothe chosen hole I38.

One of the solenoid wires I43 is connected to the recording device I andthe other solenoid wire I49 is connected to a switch terminal 230. Theswitch terminal 230 may be connected by insulation 23I to a supportingbracket 232, fixed to a stud 233, projecting from the bracket I04. Whenthe recording device I35 has been rotated suificiently to bring theswitch terminal I43 extending from the switch arm I4I into electricalcontact with the switch terminal 230, the solenoid circuit is closed,the solenoid I30 energized and the locking bolt I3I is retracted out ofengagement with the pull arm I25.

One end of a clock spring 234 is connected to a stud 235 projecting fromthe recording disc, and the other end of the clock spring is suitablyconnected to the shaft extension I35. As soon as the recording devicehas been disconnected from the drive shaft I02 through the energizationof the solenoid I30, the clock spring 234 operates to return therecording disc to the initial winding position. A projection 235 carriedby the recording disc I35 is arranged to strike the stud 233 or otherstationary part of the machine so as to limit the return movement of therecording disc. When the projection 235 is in abutment with the lug 233,the recording disc I35 indicates zero winding turns.

The recording device is simple to adjust and operate. For example, if acoil of six turns is desired, the pin I33 is inserted in the hole marked5, shown in Figure 20. The handle I21 is pulled so as to operativelyconnect the drive wheel I08 to the drive shaft I and the machine isthrown into operation. The locking bolt I3I snaps into engagement withthe notch I32 provided in the pull member I25 and retains the drivewheel I03 operatively connected to drive shaft I. When six winding turnshave been completed the contact portion I43 of the switch arm I4I' hasmoved from its position as shown in Figure 20, into contacting positionwith respect to the switch terminal 230. When this occurs the solenoidcircuit is closed, the solenoid I30 is energized and the lock bolt I 3|withdrawn so as to permit the coil I24 to draw the cam shaped lug 223 ofthe pull arm I25 over the curved end portion 224 of the clutch lever 22Iwhich inturn disengages the clutch drum 2 from the recording disc andpermits the clock spring 234 to return the recording disc to neutral orzero winding position. Simultaneously with this movement, the lever I I9detaches clutch drum ill from the drive wheel I00 so that the motor nolonger rotates the drive shaft I. The winding load on the drive shaft Iis such as to almost immediately overcome the rotating momentum of thedrive shaft and associated winding arms. The rotation of the drive shafti can be set to halt substantially immediately upon effectingdisconnection of the drive wheel I00 therefrom.

It is now seen that a coil-winding and forming machine has beenpresented upon which any number of coils may be wound simultaneously.The machine may be driven by motor, crank arm or other power means.Where a motor, or other mechanical power source is used, the machine maybe thrown into operation by a simple pull exerted by the operator on thestarting handle I21. Winding operation then continues until the desirednumber of wire strands have been wound into the coil. A switch mechanismand associated recording device is provided which may be adjusted tohalt the machine when the desired number of turns have been placed intothe coils. Means are provided for returning the recording mechanism backto neutral or zero winding position.

Little or no attention need be given by the operator to assure that theproper number of turns of wire are placed upon the coils. This featureof the invention is highly important, especially where a large number ofturns of wire are to be placed upon each coil. The operator is thuspermitted to give closer attention to the formation of the coils, and isrelieved through automatic mechanism of the important responsibility ofplacing the exact number of turns on the respectiv coils. The humanelement in forming the coils is in this respect substantiallyeliminated.

Following the completion of the winding operation, all of therespective'coils are simultaneously expanded by the simple manipulationof a crank by the operator. All of the coils are expanded simultaneouslyso as to be exact replicas of one another. The coil-expanding mechanismmay be variously adjusted so as to permit both the winding and expansionof coils of diilerent shape and size. Removable and replaceablepartition elements associated with the winding arms permit the formationof coils of various cross sectional widths and contours. The endportions of the coils may be given any desired shape and contour so asto accommodate the same to any dynamo or motor by the application ofpartition elements of the required design. Thus, by the provision ofremovable and replaceable partition elements, and the variouspermissible adjustments of the winding arms, almost every conceivableshape, form and size of coil may be formed on the machine.

Locking keys are provided to compress into compact position the coilsformed and applied to the winding arms. The locking keys retain thecoils in fixed position on the winding arms and hold the respectiveturns of the coil immovable during the expansion operation. Mechanism isfurthermore provided for weaving and laying the wire strands in even andsmooth layers as the winding operation proceeds. The mechanism forperforming this function is automatically operated and requires noattention from the operator. A simple locking pin is provided by meansof which the ends of the wire strands may be directly connected to thewinding arms.

It is thus seen that my coil-winding machine is substantially automaticin operation, and a large number of coils can be wound and shapedsimultaneously on the machine. The operations are so simple andefiective that when the winding of one set of coils is completed, thewire strands can be again connected to the machine so as to form anotherset of coils in the space of a few seconds. The machine has a very largeoutput with a minimum of labor. The machine is substantially fool-proofin operation, is sturdy and strong in construction, and is relativelyinexpensive to manufacture and assemble.

While certain novel features of this invention have been discussed inthe specification, and are art without departing from the spirit or thescope of the invention.

What I claim is:

1. A coil winding and shaping machine comprising-a rotatably mountedframe, winding arms extending laterally from said frame adapted to winda plurality of coils simultaneously, means for shifting said arms toexpand the coils wound thereon, and coil shaping elements removablypositioned on said arms.

2. A coil winding and shaping machine comprising a rotatably mountedframe, winding arms extending laterally from said frame adapted to winda plurality of coils simultaneously, and means for simultaneouslymanipulating said arms in a predetermined manner to expand the coilspositioned thereon.

3. A machine for forming armature and stator coils comprising mechanismincluding winding arms for simultaneously winding a plurality of coils,and means for simultaneously shaping and expanding the coils wound onsaid arms.

4. A coil winding and shaping machine-comprising a rotatable frame,winding arms projecting laterally from said frame and extendingsubstantially parallel to one another, means associated with said armsfor defining and shaping the cross section of said coils, and means forshifting said arms to expand the coils wound thereon.

5. A coil winding and shaping machine comprising a rotatable frame,blocks slidably mounted in said frame, winding arms adjustably mountedin said blocks and means for shifting said arms to expand the rollswound thereon.

6. Apparatus for windingarmature coils comprising a rotatable frame,winding arms projecting from said frame adapted to receive the coils,certain of said arms being arranged in pairs, and means forlongitudinally shifting the said paired arms with respect to one anotherto expand and shape the coils wound thereon.

7. A coil forming machine comprising a supporting frame, winding armsprojecting laterally from said frame, means for rotating said arms andframe so as to wind about said arms one or more coils of wire, and meansfor manipulating said arms to simultaneously expand the wire coils whenthe winding operation has been completed.

8. A coil forming machine comprising rotatably mounted winding armsextending substantially parallel to one another, certain of said armsbeing arranged in pairs, the armscomprising said pairs beinglongitudinally adjustable with respect to one another to expand thecoils wound on said arms, and means for shifting other arms laterallycloser to one another substantially simultaneously with the shifting ofsaid longitudinally shiftable arms.

9. An armature winding machine comprising winding arms extendingsubstantially paral'el to one another, means for rotating said arms towind one or more coils thereon, means for shifting certain of said armslongitudinally with respect to one another to effect expansion of thecoils wound on said arms, and means for automatically drawing other armscloser to one another substantially simultaneously with the movement ofsaid longitudinally shiftable arms.

10. A coil forming machine comprising a rotatably mounted frame, windingarms projecting laterally from said frame adapted to wind one or morecoils of wire, removable and replaceable partition elements associatedwith said J arms separating the coils and defining the cross sectionalwidth thereof, and means associated with said partition elements forlocking said coils in position.

11. A coil forming machine comprising a rotatably mounted frame, windingarms projecting laterally from said frame adapted to wind one or morecoils of wire, partition elements associated .with said arms separatingthe coils, and removable and replaceable spacer elements positionedbetween said partition elements defining and shaping the bend portionsof theflnished coils.

12. A coil forming machine comprising a rotatably mounted frame, windingarms projecting laterally from said frame adapted to wind one or morecoils of wire, removable and replaceable partition elements associatedwith said arms separating the coils and defining the cross sectionalwidth thereof, and removable and replaceable spacer elements positionedbetween said partition elements defining and shaping the bend portionsof said coils.

13. A coil forming machine comprising a plurality of winding arms, meansfor rotating said arms to wind the coils thereon, partition elementsassociated with said arms separating the coils and defining the crosssectional width thereof, means for shifting said arms to expand thecoils, and means associated with said partition elements for lockingsaid coils in position during the expanding operation.

14. A coil forming machine comprising a plurality of winding arms, meansfor rotating said arms to wind the coils thereon, partition elementsassociated with said arms separating the coils and defining the crosssectional width thereof, means for shifting said arms to expand thecoils, a locking device associated with said partition elements forretaining the coils in compact immovable position during expandingoperation of the coils, means for adjusting said looking device withrespect to said partition elements to accommodate coils of differentcross section, and means for retaining said device in coil lockingposition.

15. A coil winding machine including winding arms extendingsubstantially parallel to one another, means for rotating said arms towind the coils thereon, means for automatically and simultaneouslyshifting certain of said arms longitudinally with respect to one anotherto ef@ feet the desired shaping and expansion of the coils woundthereon, said means including an operating element, and means connectingsaid operating element to said arms.

16. A coil winding machine comprising winding arms, coil retainingportions associated with said arms, means for rotating said arms to windthe coils thereon, and means for shifting certain of said armslongitudinally with respect to one another to effect the desired shapingand expansion of the coils wound on said arms.

17.A machine for winding a plurality of' coils thereon, and means forautomatically moving the wire over the cross section of the coils duringthe winding operation so as to place the wires in uniform compactlayers.

19. A coil winding machine including a rotatable irame, winding armsprojecting laterally from said frame, means for rotating said frame soas to wind the coils on said arms, and means for halting the windingoperation when the desired predetermined number of winding turns havebeen executed, said halting means including a recording device which maybe set to indicate the number of winding turns desired, and automaticstop mechanism operatively connecting said recording device to a drivingpart of the machine.

20. In a coil forming machine, a plurality of winding arms, means forrotating said arms to wind the coils thereon, partition elementsassociated with said arms separating the coils and defining the crosssectional width thereof, and means associated with said partitionelements for locking said coils in position.

21. In a coil forming machine, a plurality of winding arms, partitionelements associated with said arms for separating the coils and definingthe cross sectional width thereof, means for shifting said arms toexpand the coils, and means associated with said partition elements forlocking said coils in position during the expanding operation.

22. In a coil forming machine, a plurality of coil receiving elements,partitions associated .with said elements separating the coils anddefining the cross sectional width thereof, means for shitting saidelements to expand the coils, a locking device associated with saidpartitions for retaining the coils in compact immovable position duringthe expanding operation of the coils, means for adjusting said lockingdevice with respect to said partitions to accommodate coils of differentcross section, and means for retaining said device in coil lockingposition.

23. In a coilforming machine, a plurality of coil receiving elements,means for rotating said elements to wind a coil thereon, partitionsassociated with said winding elements defining the I cross sectionalwidth of the coil, means for shifting said elements to expand the coil,a locking device associated with said partitions for retaining the coilin compact immovable position during the expanding operation of thecoil, means for adjusting said locking device with respect to saidpartitions to accommodate coils of different cross section and means forretaining said device in coll locking position.

24. A coil forming machine including rotatively mounted winding arms,certain said arms being longitudinally adjustable with respect tostantially simultaneously with the shifting movement of saidlongitudinally shiftable arms.

26. A coil winding and shaping machine including a rotatable frame,blocks slidably mounted in a said frame, winding arms adjustably mountedin said blocks, means for longitudinally shifting certain of said armsto expand the coils wound thereon, and means for shifting certain ofsaid blocks during the expanding operation to bring the arms carriedthereby closer to one another.

27. A coil forming machine including winding arms extendingsubstantially parallel to one another, means for rotating said arms towind one or more coils thereon, 'means for shifting certain oi said armslongitudinally with respect to one another to efl'ect expansion of thecoils wound on said arms, and means connecting said longitudinallyshiitable arms to other laterally shiftable arms to draw said arms lastmentioned progressively closer to one another as the expanding operationproceeds.

28. A coil forming machine including rotatively mounted winding arms,means for shifting certain of said arms longitudinally with respect toone another to effect the expansion of the coils wound on said arms, andlink devices for automatically drawing other arms closer to one anothersubstantially simultaneously with the movement of said longitudinallyshiftable arms.

29. A coil forming machine including a plurality of rotatably mountedwinding arms adapted to receive one or more coils wound thereon, certainof said arms being arranged in pairs, and means for shifting said pairedarms longitudinally with respect to one another so as to expand thecoils wound thereon.

30. A coil forming machine including spaced rotatably mounted windingarms, partition elements associated with said winding arms adapted toreceive motor coils between said partitions, means for longitudinallyshifting certain of said arms with respect to each other tosimultaneously expand the coils wound on said arms, and means fordisengaging the partition elements on certain of said arms to facilitateremoval of the coils therefrom.

JULIUS REICHERT.

